Composition Optimization for Functionally Gradient Parts Considering Manufacturing Constraints
Abstract
Being able to design and fabricate parts made of Functionally Gradient Materials (FGMs) with optimum properties is of prime importance. Very limited research has been carried out thus far regarding the optimization of composition of different constituent materials throughout the part. In this paper, a technique is introduced to maximize the stiffness of parts made of FGM by determining the material composition for each small element inside the part. To demonstrate the effectiveness of this technique, two examples are examined. In the first one, a two dimensional cantilever beam made of two materials is considered and a Sequential Approximate Optimization method is used to determine the optimum composition of materials for the beam so that the global stiffness is maximized. The only applied force on the beam is a nodal force acting at the tip. One of the constituent materials is stiffer and heavier than the other material. The optimization constraint is the total mass of the beam predetermined by the engineer. The problem is how to distribute materials throughout the beam so as to have the maximum stiffness. The second example is a simply supported beam under a uniform pressure. The same methodology is employed for this example to maximize the stiffness of the beam. The results show a considerable increase in the stiffness of the beams after optimization as compared to the beams with uniformly distributed materials. Additive Manufacturing (AM) methods that are capable of fabricating the designed parts and their constraints are also discussed.
Recommended Citation
A. Ghazanfari and M. C. Leu, "Composition Optimization for Functionally Gradient Parts Considering Manufacturing Constraints," ASME 2014 International Manufacturing Science and Engineering Conference, MSEC 2014 Collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference, vol. 2, article no. V002T02A021, American Society of Mechanical Engineers, Jan 2014.
The definitive version is available at https://doi.org/10.1115/MSEC2014-3960
Department(s)
Mechanical and Aerospace Engineering
International Standard Book Number (ISBN)
978-079184581-3
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Society of Mechanical Engineers, All rights reserved.
Publication Date
01 Jan 2014
